httpproxy.gopherspace.dk:75/1/proxy/https://bitsavers.org/pdf/cdc/discs/FA7A6_IBM_Channel/

       Index of /pdf/cdc/discs/FA7A6_IBM_Channel
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   DIR /pdf/cdc/discs
       70615200E_FA7A6_Disk_Controller_Hardware_Reference_Jan1977.pdf
       70631200K_FA7A6_Disk_Controller_Microprogram_Manual_Apr1975.pdf